Communication control system with ad hoc wireless communication function

A communication control apparatus used in a wireless communication system in which a plurality of first in-vehicle wireless communication units are installed in a plurality of vehicles, respectively, and a second in-vehicle wireless communication unit is installed in a vehicle, each of the pluralit of first in-vehicle wireless communication units having a centralized wireless communication function and an ad hoc wireless communication function, the second in-vehicle wireless communication unit having the centralized wireless communication function without the ad hoc wireless communication function,

• the communication control apparatus being wirelessly communicable with each of the first in-vehicle wireless communication units, and the second in-vehicle wireless communication unit according to the centralized wireless communication functions and controlling wireless communications among the communication control apparatus, each of the first in-vehicle wireless communication units, and the second in-vehicle wireless communication unit,
• each of the first in-vehicle wireless communication units:
• transmitting vehicle information of an own vehicle and vehicle information including identification information from the first-in-vehicle wireless communication unit installed in another vehicle, received from another vehicle at the communication control apparatus according to the centralized wireless communication function, when the first in-vehicle wireless communication unit receives, by a corresponding ad hoc wireless function, at least the vehicle information including the identification information from another vehicle;
• and
• transmitting only the vehicle information of the own vehicle to the communication control apparatus according to the centralized wireless communication function, when the first in-vehicle communication unit does not receive any vehicle information transmitted from another vehicle, and
• the second in-vehicle wireless communication unit transmitting the vehicle information of the own vehicle to the communication control apparatus according to the centralized wireless communication function,
• the communication control apparatus comprising:
• a first communication authorization setting means for setting a first one of the first in-vehicle wireless communication units and the second in-vehicle wireless communication unit as two of a plurality of communication enabling units that enable wireless communications with the communication control apparatus, the first of the first in-vehicle wireless communication units and the second in-vehicle wireless communication unit having transmitted only the vehicle information of their own vehicle to the communication control apparatus;
• and
• a second communication authorization setting means for setting, as another one of the plurality of communication enabling units, one of the remaining first in-vehicle wireless communication units that has not been set as one of the plurality of communication enabling units, the one of the remaining first in-vehicle wireless communication units having transmitted the vehicle information of another vehicle different from the vehicle information transmitted from the communication enabling unit.